Metal carbacylamidophosphates: ability of coordination patterns to di- and polymerization

摘要

Cobalt(II), nickel(II) and copper(II) complexes with carbacylamidophosphate ligands {Cl3C(O)NP(O)R-2}(-) (R = OMe, NEt2, NHCH2Ph, N-morpholyl) were characterized by means of X-ray diffraction, IR, UV-Vis spectroscopy and thermal analysis. The organic ligands were coordinated via oxygen atoms of phosphoryl and carbonyl groups forming six membered chelate cycles. The molecular units M{L}(2) reveal ability for self-association and readily yield different di- and polymeric motifs either by mu(2)- phosphorylic bridges, donor atoms of the morpholine substitute or employing an additional bridging ligand. Cobalt and nickel solvates [M{L}(2)((PrOH)-O-i)](2) exist as characteristic dimers sustained by phosphoryl bridges between octahedral metal atoms, while copper complexes aggregate through self-complementary Cu-O interactions with a morpholine substitute forming one-dimensional chains [Cu{L}(2)](n) or dimers [Cu{L}(2)((PrOH)-O-i)](2) involving terminal 2-propanol ligands. The configuration of binding sites for [Cu{L}(2)] (R = N-morpholyl) favors the densest pairwise association of the molecules with Cu-O (morpholine) at approximately 2.55 Angstrom. (C) 2003 Elsevier Science Ltd. All rights reserved. [References: 26]